Snow, K and Hogg, AM and Downes, SM and Sloyan, BM and Bates, ML and Griffies, SM, Sensitivity of abyssal water masses to overflow parameterisations, Ocean Modelling, 89 pp. 84-103. ISSN 1463-5003 (2015) [Refereed Article]
Copyright 2015 Elsevier Ltd.
Overflow parameterisations that affect only tracer equations are compared to a fully dynamical Lagrangian point particle method. An overflow parameterisation involving partial convective mixing of tracers is most efficient at transporting dense NADW water downslope. This parameterisation leads to a maximum mean increase in density in the north of 0.027 kg m-3 and a decrease in age of 525 years (53%). The relative change in density and age in the south is less than 30% of that in the north for all overflow parameterisations. The reduced response in the south may result from the differing dense water formation and overflow characteristics of AABW compared to NADW. Alternative approaches may be necessary to improve AABW representation in z*-coordinate ocean climate models.
|Item Type:||Refereed Article|
|Keywords:||overflow parameterisations, AABW, NADW, global climate models, sector model, overflow schemes|
|Research Division:||Earth Sciences|
|Research Field:||Physical oceanography|
|Objective Division:||Environmental Policy, Climate Change and Natural Hazards|
|Objective Group:||Understanding climate change|
|Objective Field:||Climate change models|
|UTAS Author:||Downes, SM (Dr Stephanie Downes)|
|Web of Science® Times Cited:||20|
|Deposited By:||CRC-Antarctic Climate & Ecosystems|
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